Only overwrite options from envvar if the envvar is defined.

rubygame · Dec 8, 2007 · 544360f · 544360f
1 parent 7d4f756
commit 544360f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Rakefile b/Rakefile
@@ -154,7 +154,7 @@ def string_option( task_name, option_name=nil )
 	option_name = task_name unless option_name
 	option_name = option_name.intern if option_name.kind_of? String
 
-	$options[option_name] = ENV["#{task_name}"]
+	$options[option_name] = ENV["#{task_name}"] if ENV["#{task_name}"]
 end
 
 bool_option :"sdl-gfx",   nil,  "SDL_gfx support"